Wirt writes:
> There's bound to be at least a small buffer in the printer that is totally
> beyond the control of the HP3000 -- and that buffer may actually be very
> large.

Fortunately at least some recent HP LaserJet models (5Si, etc.) finally
provide a "Cancel Job" function that you can invoke from the front panel
which will drain all the remaining data in the job into the bit bucket for
you, thus avoiding the old yank-the-paper-tray, wait-til-it-stops,
power-cycle-it, put-the-tray-back, wait-for-it-to-warm-up sequence.

G.